Hull Speed
Вставка
- Опубліковано 28 чер 2024
- Figuring out hull speed for a displacement hulled vessel, such as a sailboat. How to cheat hull speed and go faster.
Follow us on Facebook at / puffinsv1
Puffin is a 67 foot Dutch steel hulled sailing ketch that I purchased in Italy. My wife and I have lived on PUFFIN for about a year following an extensive refit, and she is home. We are living the dream in Charleston, South Carolina.
The first 90 seconds of this video is the simplest explanation I've ever heard about hull speed. Thanks very much and great job!
Just listened to a naval architect explain this. Nothing like the explanation you just gave. Common sense. Brilliant.
Thank you for being so clear and concise! You are a rare phenomenon on UA-cam.
Very informative without being overly long or boring.
Now I want more.
i think this is the best explanation i could find on the internet! Great thanks!
Soy diseñador y constructor naval. Y a mi juicio tu explicación es brillante no solo por ser cierta, sino también por ser simple y entendible para la gente sin conocimientos técnicos profundos en dinámica de fluidos. Lo bueno, si es breve, dos veces bueno. Saludos.
Superb explanations; you have answered several questions I've had for a while. Clear and concise, excellent, many thanks, Nick.
I’m a newb to boating, trying to get my head around planing a marginally powered 8’ inflatable.
This is a top notch explanation. Many thanks.
Wow, three years later I found this. Thank you very much for free school lessons!
No computer graphics to explain this? Just a whiteboard and a pen? Oh, and you know what you're talking about! Great stuff!
Guess he wasn't raised on Nintendo
@@robwright3099 that makes no sense, are you stating that people who played nintendo doesn't have the capability to learn in different ways?
I actually believe a modified old-school method of teaching is faster and more readily learned than wasting time on all this CAD system bullshit !!! … for 1200 years since the Vikings , just looking at the Gokstad longship has helped me understand and learn … ie: the 45 degree angle of the bow , the chine to keel angle , the beam to length ratio and the fact that you don’t need a gel coat to float !!! … hells bells , Chris-Craft and Hacker-Craft runabouts that everyone loves were trial and error experiments before being perfected !!!
Back to basics
So you’re saying if you don’t have computer graphics, you can’t teach? Or don’t know what you’re talking about??
Incredible video. clear, concise, and informational. keep it up!
Great job, well thought out, to the point and presented without needless side stories, rabbit holes and chit-chat that is prevalent in many UA-cam videos.
Perfect example of a clear explanation, well done!
Another well thought out video. Thanks for educating us! An excellent explanation.
Im back. I was here around 2020 and now again in 2022. This is the best, down to earth, useable guide on the internet. Thanks from Denmark! I hope you are still enjoying sailing.
Thanks for this video! To the point with just enough technical jargon. You sir are a natural teacher!
Thank you Brad. What a simple and yet comprehensive explanation. You’re an excellent teacher.
The delivery of the information in this video is just outstanding. As a side note on the principles of shouldering water my grandad had a saying. 'You try to go any faster, and you'll just be draggin' the whole bay behind you."
I have to say this was very informative and very clear.. nice work... fair winds to you and Puffin...
a wonderfully simple explanation. I spent years sailing as a kid... with some very intelligent guys, but I've never heard hull-speed explained like that.
This was great! For one just starting to research for my sailing adventure, this gave some great context for my future boat.
Thank you very much for putting the time on it.
very informative & well presented !!!
not too little info , not too much info . PERFECT !!!
Thank you: clear and to the point. Much appreciated.
Hey mate, self employed marine engineer here. 18 years in the marine industry. Just learnt what hull speed really meant today. Thank you.
Not being an engineer does not mean that you don't understanding physics and fluid dynamics. You did an excellent job of explaining Hull Speed.Thanls for helping us understand.
A masterclass not only in hydrodynamics but in how to get a message across in simple yet effective terms. I wish this guy was my dad!
Absolutely amazing work, thank you so much for this quality content
Cheers Brad...once again very well explained mate!
Best explanation I have seen. Brad you don't over complicate things and that makes you an excellent teacher.
This was time well spent. Thank you Man!
Brad you have done a wonderful thing....you have taught me something I didn't know...actually something I did not know I didn't know.
You must have been a teacher in a past life because you are brilliant at it. Thanks you so much for these great videos, please keep 'em coming.
Never guessed that spinnaker creates a lift. That's surprisingly cool.
This is the most I have learned from a sailing video ever
Excellent Video, very thoroughly explained. I had a gut instinct about the winged keel and you just explained why it is beneficial...thank you for being a great teacher...
The BEST and most comprehensive explanation of HS I have ever seen. Thank you!n😊
Hi Brad, I really enjoyed this presentation. Thanks for taking the time to put it together and share.
Merv, Thanks for watching! With any luck this vid will help you shape your quest for a boat, or if you already own one, enjoy it to its fullest. Cheers!
The types of sails used really explained a lot. I live in Florida and i like to watch the sail boats and how fast they go. Now I understand they're trying to overcome their hull speed. Thanks for the explanation!
Great job. Well presented. No unnecessary fluff. Adding value and then shutting down.
Thank you captain. You are a great instructor.
An incredibly detailed and inspirational video that helped me pass my sailing edicate class. Thanks so much brad.
Zeke, Thanks for watching, and glad to have helped!
A nice explanation. Love the simple wsy of explanation. 😊 And the nice warm feeling of pufin's interior. 😊
well thanks for that. I was able to find it easily, what a beautiful boat...
I can't imagine having anything larger than that must have been a handful but just a beautiful boat thanks again
This is the BEST explanation I have EVER listen about displacement hull design, after year of sailing, I had never found SUCH A PERFECT beautiful simple clear explanation. Subscribed immediately, I will watch ALL your video. Thank you! That is what a sea-man should be!
Thanks for watching! Another viewer wrote in about the second bow wave peak (following the main bow wave), and explained about the distance between crests as a function of speed. Same result, but an interesting viewpoint.
try to search about marine engineering you found more to learn
Spent ays reading technical stuff on this, but got no closer to being about to run a simple calculation on a basic hull. Even with the most sophisticated mathematics it turns out to be an estimate anyway, so this simple presentation and formula was a great find. Thanks Brad. Subscribed.
Hi, thank you, never noticed a smooth way to explain things, thanks again, that was so helpful
That was great. Perfect. Thanks for taking the time.
Brief, concise, comprehensive and very informative clip.
I learned A LOT in your video. Thank you, Sir!
Wow!! Splendid explanation, cheers!
Good video. Clear, simple and right to the heart of the matter.
Allen, Thanks for watching!
What a fantastic explanation! And some great tips too. I want more video's.... Sailing Puffin, you are awesome :)
I am truly blessed to have you guys as neighbors!
Good man at last someone who knows there stuff. Your are a good teacher. 11+Kn well done...Brian London
Brian Evolved, Thanks for watching! The amount of research that preceded my boat search was staggering! Guess that's why they invented rum?
Your educational videos are so good, it's a real shame you don't make more. Thank you for the lesson!
My full respect, you nailed it!
You explain this better than anyone on youtube. Wish you were still doing videos.
I ve just ENLIGHTENED!!! Thank you sir. Liked and subscribed!
Excellent presentation and straight forward info. Many thanks!
I recommend that you make more descriptive videos .... You explain things clearer than many others.... Thankyou for posting....
DocScience2, Thanks for watching!
Great video, Helps me to progress with boat plans. Thanks
I would love more of these explanations about naval architecture!
You’re really good in explaining this stuff. Do it more :) Thank you.
Wow. I've tired of boating videos because their mostly travelog. Finally someone talking sailing. Thanks.
Excellent lecture - you have a talent 👍
you got a perfect way of teaching!
Awesome video, great way of explaining.
Thank you!
This was simple, straight forward and understandable.
Sean, Thanks for watching! The explanation I gave is only mostly correct; 1.34 x square root of the water line length will get you CLOSE, but it won't fully describe an individual boat's hull speed. Some folk have commented that I left out equations governing the wetted surface at various angles of heel, laminar flow coefficients and other paralyzingly intricate computations. My thought was that the average buyer, like me, wanted a 90 to 95 percent correct estimate that I could do in my head while looking at a boat. Hope you can use the vid to help make your boat purchase choice easier!
Well done I learned something new, that makes it a great day, thank you.
Concise , clear, and well presented...thank you .
I always wondered what the bulb on the front was for.
I thought it was for buoyancy so the nose didn't dive so much.
Very well explained from across the pond. 👍
I had to do a science project on this and it helped me out a lot. Thanks
Awesome! Love learning this stuff.
Best explanation I ever heard Sir Thank you
I can't believe this is free. Thanks Cap'n.
Very straightforward and intelligent video! I learned some surprising things.
Trevor, Thanks for watching!
I really like your videos,they give me new knowledge:)
This is great. Your explanation of the bow wave was so intuitive. Your right when you say a dirty bottom or bigger keel will create more drag, but I don't think it will reduce your "hull speed". There is a force balance between the power of the engine/sails and the drag from the boat. If you apply more force you can overcome the drag but not the bow wave (aside from vertical lift from sails)
Sailex W,
Thanks for watching! I found it a fascinating topic (my brain must be damaged), and it makes me want to experiment. Guess I need a testing tank? If you are looking for some fun reading, try Dave Gerr's 'The Nature of Boats'. Think you will enjoy it.
When you get on UA-cam to find out why aircraft carriers move so darn fast for their size. Wonderful explanation for veteran and and novice alike.
Nice and clear explanation of a complex calculation.
Excellent video, thanks. You are a top teacher :)
Great explanation. Nice and to the point without being confusing. Interesting that cavitation detracts from hull speed on displacement hulls but increases hull speed on planning hulls. However I believe that is due to surface tension/resistance of the hull in contact with the water. So interesting to walk through a shipyard and look at all the variations of vessel hulls. My favourite pass time.
Thanks Captain, excellent information!
Terrific! Thank you for this very clear explanation!
Excellent. Congratulations.
Great presentation!
Thanks so much for such a simple explanation.. looking for more of your videos now :)
Great lesson on hull speed, but a Master Class on teaching by simplicating the subject matter.
Thank you.
My God, I feel smart now. Thanks for the great video.
Excellent and easy to understand, thank you!
So THAT's what it means! Magnificent! Thank you.
Great informative lesson ! Thank you so much!
Great channel, thanks Cap!
Thanks, much appreciated.
Thank you, sir! Great explanation!
Excellent explanation for a regular guy on a sailboat.
Outstanding explanation.
VERY WELL explained! Thank you!
Excellent explanation. Thanks.
Good explanation. I actually used it to explain hull speed to an electrician. Thanks.
Marc, Love it! Hope I did not confuse him too much!
Great video. Thanks for explaining the huge extension on cargo ships. I always wondered the principal behind them. Although Not enough to Google.
Subscribed, great video and well explained. Thanks